Scarifying attachment for road-engines.



0. M. GREINER & H. D. JONES. SCARIFYING ATTACHMENT FOR ROAD ENGINES.

APPLICATION FILED MAR- 4. I915.

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Patented May 15, 1917.

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C. M. GREINER & H. D. JONES.

SCARIFYING ATTACHMENT FOR ROAD ENGINES, APPLHCATION FILED MAR. 4, 1915. L zfififim Patented May15,1917.

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CHARLES M. GREINER AND HENRY D. JONES, 0F SPRINGFIELD, OHIO, ASSIGNORS TO THE KELLY-SPRINGFIELD CORPORATION OF OHIO.

ROAD ROLLER COMPANY, OF SPRINGFIELD, OHIO, A

SGARIFYING ATTACHMENT FOR ROAD-ENGINES.

Specification of Letters Patent.

Patented May 15, 19117.

, Application filed March 4, 1915. Serial No. 12,045.

To all whom it may concern:

Be it known that we, CHARLES M. GREINER and HENRY D. JONES, citizens of the United States, residing at Springfield, in the county of Clark and State of Ohio, have invented certain new and useful Improvements in Scarifying Attachments for Road-Engines, of which the following is a specification.

This invention relates to improvements in scarifying attachments for road engines.

The object of the invention is to provide an attachment of the character referred-to which will be effective in operation and simple in its construction and mannerof operation In the accompanying drawings- Figure l is a side view of a road engine showing the improvements applied thereto, one position of the same being indicated in dotted lines. 2

Fig. 2 is a rear'view of the same with the gasolene tank of the engine removed to better illustrate some of the parts.

Like parts are indicated by similar characters of reference in the several views.

In the said drawings, the improvements have been shown applied to a road roller of the gas engine type in which 1 indicates the rear wheels, 2 the water tank, and 3 a .gasolene tank, this latter tank being shown removed inFig. 2.

The scarifying devices proper consist of a series of spikes 4, secured in any suitable manner at the rear ends of drag-bars, 5, the forward ends of said bars being firmly clamped to a transversely arranged draft:

bar, 6. This draft-bar is rotatably mounted in bearings 7, bolted to a rail 8, which extends across and is secured to the lower rear edge of the water tank 2, the bearings being braced by rods 9, which have their lower ends secured to the bearings and their upper ends to the main frame. r The scarifying devices are raised and lowered and have pressure applied thereto in the following manner: The draft-bar 6 has firmly secured thereto an upwardly-extending arm, 10, shown as preferably made in two parts securely bolted together; the arm and one of the drag-bars 5 being located closely adjacent the respective sides of one of the bearings 7 so as to hold the draft-bar from endwise movement. The upper end of the arm 10 is bifurcated and straddles and .is pivotally connected, as at 11, with a sleeve 11, slidably mounted ona pressure rod 12. The forward end of this rod 12 is pivotally connected at 12. to the lower end of the outer free edge of a vertically arranged pivoted worm segment 13, and between the sleeve 11 and a collar 14 at the forward end of the rod is a coil spring 15, the movement of the sleeve 11 along the rod, being limited by a collar 16 fixed to the extreme rear end of the rod; a seriesof washers 17 being em ployed. for adjusting the tension of the spring by inserting them between the. collar 16 and sleeve 11 or between the spring and the sleeve 11. v

The segment 13 is pivoted, as at 18, to the side of the main frame a, and meshes with a worm 19, arranged in a bracket 20, secured to the side of the tank. The worm 19 has an upwardly extending shaft 21, which is connected by a universal coupling 22 with a shaft or rod 23, rotatably mounted in the upper end of a support 24 and provided with a hand-wheel 25.

When it is desired to raise or lower the device, the hand wheel is turned and, through the connections described, the segment rotated. The rotating of the segment, through the rod 12 and arm 10, raises or lowers the scarifying devices. By the arrangement described we are enabled to secure the greatest effect at the point where the most force is required; that is, at the point where the scarifying spikes are forced to the proper depth within the ground. It will be seen that by connecting the rod 12 to the extreme outer edge of the segment, 13, the segment 13 and rod 12 form in effect a toggle-joint, the power for the operating of which is applied at the point 12 where the members thereof are pivotally connected together. This toggle-joint has its greatest break when the spikes are in their uppermost raised position. As the segment rotates upwardly to lower the spikes to their working position, the toggle joint begins to straighten out until, by the time the spikes have reached the ground line the position of this toggle joint will be such as to exert the greatest power to thrust the spikes from the ground line to the proper depth therebeneath; that is, the members of the toggle will be nearly straight relatively ,to each other. So soon as the spikes have reached their proper depth the toggle will be straight, as indicated in full lines in Fig. 1, or, in other words, the rod 12 will have assumed a position parallel with a line drawn through the pivotal points 11' and 18. In this position of the parts, the rod 12 at the point where it is pivotally connected with the segment, is in contact with the bearing for the worm on the bracket 20, so that a positive .lock is provided against the raising of the scarifiers, but the scarifying devices may relieve themselves, in meeting obstructions, against the tension of the spring 15, which yieldingly holds the scarifying spikes to their work. The worm and worm segment will in fact form a lock for the scarifying devices in any position thereof so that said devices may be raised or lowered to any height from the ground and held in that position by said worm and worm segment, but when the scarifying device is in its extreme depth of penetration the bracket bearing for the worm forms the look, as above indicated, so that the worm and worm gear are relieved of this duty.

Having thus described our invention, We claim:

1. In a scarifying attachment for road engines, scarifying devices movably attached to the rear of said engine, two lever members pivotally connected together, one of said lever members being pivotally connected with said engine and the other with said scarifying devices, a coil spring carried by one of said members for exerting spring pressure upon said scarlfymg devlces, means for applying power to said lever members said scarifying devices, gear teeth arranged upon one of said members, a worm in mesh with said gear teeth together with means for operating said worm, a support for said worm, the pivotal connection between said members being at a point substantially in line with said gear teeth and the position of said support being such that when said lever members have been operated to a substantially straightened position said support will form a positive lock for the same in one direction.

In testimony whereof, we have hereunto set our hands this 2nd day of March 1915.

CHARLES M. GREINER. HENRY D. JONES.

Witnesses:

CHAS. I. WELCH, EFFA M. SMITH. 

